Question

Which of the following is a factor of 2x4 + 22x3 + 60x2?

Can someone explain how you get the answer?

Answer 1

take 2x2 common

Answer 2

\[2x^{2}(x^{2}+11x+30)\]

Answer 3

\[=2x^{2}[x^{2}+5x+6x+30]\]

Answer 4

\[=2x^{2}[x(x+5)+6(x+5)]\]

Answer 5

\[=2x^{2}[(x+5)(x+6)]\]

Answer 6

this is the final answer